class A{
	A() { }
	A(int m) { x = m; }
	int x;
}

class B extends A{
	B(){
		super(3);	
	}
	int y;
	
}

public class P1_InhConst{
	public static void main(String args[]){
		A a = new A(1);
		B b = new B();
		//a.x   b.x   a.y   b.y  这些表达式输出什么值？
	}
}